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8.2.2 General Specifications
The following tables list the controller environmental and communication
specifications.
(1) Environmental requirements
Item Specifications
Power
requirements
5 VDC (supplied via the controller ISA bus)
Operating
temperature
0 to 40°C
Operating
humidity
90% RH or less (without condensation)
(2) DeviceNet communications specifications
Item Specifications
Communications
protocol
DeviceNet-compliant
Connection
supported
Master/slave connection : Polling I/O function
Compliant with DeviceNet communications rules
Connection type
(Note 1)
Multi-drop type with possible combination of T-branch
(to trunk and branch lines)
Bit rate 500, 250, 125 kbps (selectable by switch)
Communications
media
Special cable consisting of 5 wires
(2 for signals, 2 for power supply and 1 as a shield wire)
Bit rate
Max. network
length
Branch
length
Total branch length
500 kbps
100 m or less
(Note 2)
6 m or less 39 m or less
250 kbps
250 m or less
(Note 2)
6 m or less 78 m or less
Communications
cable length
125 kbps
500 m or less
(Note 2)
6 m or less 156 m or less
Power supply for
communication
External supply of 24 VDC ±10%
Internal power
consumption
Communication power source: 30 mA max.
Max. number of
connectable nodes
64 nodes (including configurator (converter) if connected)
Number of I/Os
Standard assignment mode:
40 points for system input
32 points for system output
24 points to 216 for user input
24 to 224 points for user output
The number of I/Os can be set in unit of 8 points.
Compatible assignment mode:
24 points for system input
32 points for system output
40 to 232 points for user input
24 to 224 points for user output
The number of I/Os can be set in unit of 8 points.
Error check CRC
(Note 1) Terminator resistors are needed at both ends of the trunk line.
(Note 2) These values may apply when a special thick cable is used as a trunk line. If a
special fine cable is used, the max. network length is 100 m or less.
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